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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '287efdd7723666c7db359b4e94a1dc40d4b082854fbcf6461eb8b54f684277a6' 
  AND token = 'x5BvvHPR7kXL2itm8/q0MvkYP+9Bmh4sffQjimHQH74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}